Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm

Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pin...
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Autor*in:	Wang, X. L. [verfasserIn] Ma, Y. X. Zhou, P. Ma, H. T. Li, X. Xu, X. X. Liu, Z. J.

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2009

Anmerkung:	© Pleiades Publishing, Ltd. 2009

Übergeordnetes Werk:	Enthalten in: Laser physics - Bristol [u.a.] : IOP Publ., 2006, 19(2009), 5 vom: Mai, Seite 984-988
Übergeordnetes Werk:	volume:19 ; year:2009 ; number:5 ; month:05 ; pages:984-988

Links:	Volltext

DOI / URN:	10.1134/S1054660X09050168

Katalog-ID:	SPR020127510

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520			\|a Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop.
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allfields	10.1134/S1054660X09050168 doi (DE-627)SPR020127510 (SPR)S1054660X09050168-e DE-627 ger DE-627 rakwb eng Wang, X. L. verfasserin aut Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Pleiades Publishing, Ltd. 2009 Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop. Ma, Y. X. aut Zhou, P. aut Ma, H. T. aut Li, X. aut Xu, X. X. aut Liu, Z. J. aut Enthalten in Laser physics Bristol [u.a.] : IOP Publ., 2006 19(2009), 5 vom: Mai, Seite 984-988 (DE-627)509758444 (DE-600)2228434-5 1555-6611 nnns volume:19 year:2009 number:5 month:05 pages:984-988 https://dx.doi.org/10.1134/S1054660X09050168 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_110 GBV_ILN_150 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2190 AR 19 2009 5 05 984-988
spelling	10.1134/S1054660X09050168 doi (DE-627)SPR020127510 (SPR)S1054660X09050168-e DE-627 ger DE-627 rakwb eng Wang, X. L. verfasserin aut Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Pleiades Publishing, Ltd. 2009 Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop. Ma, Y. X. aut Zhou, P. aut Ma, H. T. aut Li, X. aut Xu, X. X. aut Liu, Z. J. aut Enthalten in Laser physics Bristol [u.a.] : IOP Publ., 2006 19(2009), 5 vom: Mai, Seite 984-988 (DE-627)509758444 (DE-600)2228434-5 1555-6611 nnns volume:19 year:2009 number:5 month:05 pages:984-988 https://dx.doi.org/10.1134/S1054660X09050168 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_110 GBV_ILN_150 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2190 AR 19 2009 5 05 984-988
allfields_unstemmed	10.1134/S1054660X09050168 doi (DE-627)SPR020127510 (SPR)S1054660X09050168-e DE-627 ger DE-627 rakwb eng Wang, X. L. verfasserin aut Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Pleiades Publishing, Ltd. 2009 Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop. Ma, Y. X. aut Zhou, P. aut Ma, H. T. aut Li, X. aut Xu, X. X. aut Liu, Z. J. aut Enthalten in Laser physics Bristol [u.a.] : IOP Publ., 2006 19(2009), 5 vom: Mai, Seite 984-988 (DE-627)509758444 (DE-600)2228434-5 1555-6611 nnns volume:19 year:2009 number:5 month:05 pages:984-988 https://dx.doi.org/10.1134/S1054660X09050168 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_110 GBV_ILN_150 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2190 AR 19 2009 5 05 984-988
allfieldsGer	10.1134/S1054660X09050168 doi (DE-627)SPR020127510 (SPR)S1054660X09050168-e DE-627 ger DE-627 rakwb eng Wang, X. L. verfasserin aut Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Pleiades Publishing, Ltd. 2009 Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop. Ma, Y. X. aut Zhou, P. aut Ma, H. T. aut Li, X. aut Xu, X. X. aut Liu, Z. J. aut Enthalten in Laser physics Bristol [u.a.] : IOP Publ., 2006 19(2009), 5 vom: Mai, Seite 984-988 (DE-627)509758444 (DE-600)2228434-5 1555-6611 nnns volume:19 year:2009 number:5 month:05 pages:984-988 https://dx.doi.org/10.1134/S1054660X09050168 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_110 GBV_ILN_150 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2190 AR 19 2009 5 05 984-988
allfieldsSound	10.1134/S1054660X09050168 doi (DE-627)SPR020127510 (SPR)S1054660X09050168-e DE-627 ger DE-627 rakwb eng Wang, X. L. verfasserin aut Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm 2009 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © Pleiades Publishing, Ltd. 2009 Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop. Ma, Y. X. aut Zhou, P. aut Ma, H. T. aut Li, X. aut Xu, X. X. aut Liu, Z. J. aut Enthalten in Laser physics Bristol [u.a.] : IOP Publ., 2006 19(2009), 5 vom: Mai, Seite 984-988 (DE-627)509758444 (DE-600)2228434-5 1555-6611 nnns volume:19 year:2009 number:5 month:05 pages:984-988 https://dx.doi.org/10.1134/S1054660X09050168 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER GBV_ILN_20 GBV_ILN_24 GBV_ILN_40 GBV_ILN_63 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_101 GBV_ILN_110 GBV_ILN_150 GBV_ILN_161 GBV_ILN_213 GBV_ILN_230 GBV_ILN_293 GBV_ILN_702 GBV_ILN_2190 AR 19 2009 5 05 984-988
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title	Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm
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title_full	Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm
author_sort	Wang, X. L.
journal	Laser physics
journalStr	Laser physics
lang_code	eng
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publishDateSort	2009
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author_browse	Wang, X. L. Ma, Y. X. Zhou, P. Ma, H. T. Li, X. Xu, X. X. Liu, Z. J.
container_volume	19
format_se	Elektronische Aufsätze
author-letter	Wang, X. L.
doi_str_mv	10.1134/S1054660X09050168
title_sort	coherent beam combining of two w-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm
title_auth	Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm
abstract	Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop. © Pleiades Publishing, Ltd. 2009
abstractGer	Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop. © Pleiades Publishing, Ltd. 2009
abstract_unstemmed	Abstract We demonstrate coherent beam combining of two W-level fiber amplifiers based on stochastic parallel gradient descent (SPGD) algorithm at 8 m distance in a simulated turbulence atmospheric environment. A photodetector was used to get the coherent optical intensity of the main-lobe from a pinhole, based on the intensity and the SPGD algorithm, the phase controlling was performed by the digital signal processor. In order to simulate the atmospheric environment, turbulence was induced in the free space of the light path by fans and air-conditions in the lab. Experimental result shows that the system performs well for long-time both with and without the simulating turbulence in close-loop, combining efficiency as high as 84.25% with turbulence and 84.85% without turbulence were realized. Visibility increased from near zero in open-loop to 0.432 with turbulence and 0.505 without turbulence in close-loop and the residual phase error is controlled to be less than λ/18. The probability of energy encircled in the main-lobe to be more than 70% of its ideal value was increased from 18.66 to 93.71% without turbulence and from 14.80 to 92.49% with turbulence when the system evolves from open-loop to close-loop. © Pleiades Publishing, Ltd. 2009
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container_issue	5
title_short	Coherent beam combining of two W-level fiber amplifiers in turbulence atmospheric environment based on stochastic parallel gradient descent algorithm
url	https://dx.doi.org/10.1134/S1054660X09050168
remote_bool	true
author2	Ma, Y. X. Zhou, P. Ma, H. T. Li, X. Xu, X. X. Liu, Z. J.
author2Str	Ma, Y. X. Zhou, P. Ma, H. T. Li, X. Xu, X. X. Liu, Z. J.
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doi_str	10.1134/S1054660X09050168
up_date	2024-07-03T14:05:47.285Z
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